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<title>GrADS Command: set hempref</title>
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<h2><b>set hempref</b></h2>
<p>
<code>set hempref auto|nhem|shem</code>
<p>
This command controls the way wind barbs are plotted for any output
where wind barbs are produced (e.g. <a
href="gradcomdsetgxout.html"><code>set gxout barb</code></a>). 

The options are as follows:
<p>
<ul>
<code>auto</code> (default) 
<ul>The Northern Hemisphere convention is used for wind barbs at
positive latitudes and the Southern Hemisphere convention is used for
wind barbs at negative latitudes. Barbs and flags are drawn on
opposite sides of the wind arrow in the different Hemispheres.</ul>
<p>
<code>nhem</code>
<ul>Overrides the default behavior so that all wind barbs 
are plotted using the Northern Hemisphere convention.</ul> 
<p>
<code>shem</code>
<ul>Overrides the default behavior so that all wind barbs 
are plotted using the Southern Hemisphere convention.</ul> 
</ul>

<p>
<h3>Usage Notes</h3>
<ol>
</ol>

<p>
<h3>Examples </h3>


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